20822111656 has 16 divisors (see below), whose sum is σ = 39152063700. Its totient is φ = 10381561344.

The previous prime is 20822111617. The next prime is 20822111657. The reversal of 20822111656 is 65611122802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20727360900 + 94750756 = 143970^2 + 9734^2 .

It is not an unprimeable number, because it can be changed into a prime (20822111657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3683811 + ... + 3689458.

Almost surely, 2^20822111656 is an apocalyptic number.

It is an amenable number.

20822111656 is a deficient number, since it is larger than the sum of its proper divisors (18329952044).

20822111656 is a wasteful number, since it uses less digits than its factorization.

20822111656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373628 (or 7373624 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 20822111656 in words is "twenty billion, eight hundred twenty-two million, one hundred eleven thousand, six hundred fifty-six".